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<?php |
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if ( ! defined( 'ABSPATH' ) ) exit; // Exit if accessed directly |
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|
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class autoptimizeScripts extends autoptimizeBase |
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{ |
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private $scripts = array(); |
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private $dontmove = array('document.write','html5.js','show_ads.js','google_ad','blogcatalog.com/w','tweetmeme.com/i','mybloglog.com/','histats.com/js','ads.smowtion.com/ad.js','statcounter.com/counter/counter.js','widgets.amung.us','ws.amazon.com/widgets','media.fastclick.net','/ads/','comment-form-quicktags/quicktags.php','edToolbar','intensedebate.com','scripts.chitika.net/','_gaq.push','jotform.com/','admin-bar.min.js'); |
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private $domove = array('gaJsHost','load_cmc','jd.gallery.transitions.js','swfobject.embedSWF(','tiny_mce.js','tinyMCEPreInit.go'); |
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private $domovelast = array('addthis.com','/afsonline/show_afs_search.js','disqus.js','networkedblogs.com/getnetworkwidget','infolinks.com/js/','jd.gallery.js.php','jd.gallery.transitions.js','swfobject.embedSWF(','linkwithin.com/widget.js','tiny_mce.js','tinyMCEPreInit.go'); |
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private $trycatch = false; |
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private $forcehead = false; |
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private $jscode = ''; |
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private $url = ''; |
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private $move = array('first' => array(), 'last' => array()); |
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private $restofcontent = ''; |
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private $md5hash = ''; |
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|
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//Reads the page and collects script tags |
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public function read($options) |
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{ |
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//Remove everything that's not the header |
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if($options['justhead'] == true) |
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{ |
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$content = explode('</head>',$this->content,2); |
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$this->content = $content[0].'</head>'; |
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$this->restofcontent = $content[1]; |
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} |
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|
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$excludeJS = $options['js_exclude']; |
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if ($excludeJS!=="") { |
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$exclJSArr = array_filter(array_map('trim',explode(",",$excludeJS))); |
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$this->dontmove = array_merge($exclJSArr,$this->dontmove); |
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} |
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|
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//Should we add try-catch? |
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if($options['trycatch'] == true) |
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$this->trycatch = true; |
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|
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// force js in head? |
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if($options['forcehead'] == true) |
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$this->forcehead = true; |
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|
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// get cdn url |
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$this->cdn_url = $options['cdn_url']; |
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|
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// noptimize me |
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$this->content = $this->hide_noptimize($this->content); |
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|
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//Save IE hacks |
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$this->content = preg_replace('#(<\!--\[if.*\]>.*<\!\[endif\]-->)#Usie','\'%%IEHACK%%\'.base64_encode("$1").\'%%IEHACK%%\'',$this->content); |
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|
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//Get script files |
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if(preg_match_all('#<script.*</script>#Usmi',$this->content,$matches)) |
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{ |
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foreach($matches[0] as $tag) |
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{ |
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if(preg_match('#src=("|\')(.*)("|\')#Usmi',$tag,$source)) |
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{ |
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//External script |
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$url = current(explode('?',$source[2],2)); |
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$path = $this->getpath($url); |
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if($path !== false && preg_match('#\.js$#',$path)) |
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{ |
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//Inline |
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if($this->ismergeable($tag)) |
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{ |
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//We can merge it |
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$this->scripts[] = $path; |
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}else{ |
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//No merge, but maybe we can move it |
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if($this->ismovable($tag)) |
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{ |
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//Yeah, move it |
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if($this->movetolast($tag)) |
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{ |
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$this->move['last'][] = $tag; |
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}else{ |
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$this->move['first'][] = $tag; |
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} |
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}else{ |
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//We shouldn't touch this |
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$tag = ''; |
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} |
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} |
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}else{ |
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//External script (example: google analytics) |
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//OR Script is dynamic (.php etc) |
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if($this->ismovable($tag)) |
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{ |
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if($this->movetolast($tag)) |
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{ |
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$this->move['last'][] = $tag; |
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}else{ |
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$this->move['first'][] = $tag; |
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} |
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}else{ |
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//We shouldn't touch this |
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$tag = ''; |
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} |
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} |
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}else{ |
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//Inline script |
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if($this->ismergeable($tag)) |
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{ |
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preg_match('#<script.*>(.*)</script>#Usmi',$tag,$code); |
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$code = preg_replace('#.*<!\[CDATA\[(?:\s*\*/)?(.*)(?://|/\*)\s*?\]\]>.*#sm','$1',$code[1]); |
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$code = preg_replace('/(?:^\\s*<!--\\s*|\\s*(?:\\/\\/)?\\s*-->\\s*$)/','',$code); |
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$this->scripts[] = 'INLINE;'.$code; |
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}else{ |
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//Can we move this? |
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if($this->ismovable($tag)) |
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{ |
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if($this->movetolast($tag)) |
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{ |
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$this->move['last'][] = $tag; |
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}else{ |
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$this->move['first'][] = $tag; |
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} |
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}else{ |
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//We shouldn't touch this |
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$tag = ''; |
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} |
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} |
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} |
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|
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//Remove the original script tag |
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$this->content = str_replace($tag,'',$this->content); |
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} |
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|
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return true; |
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} |
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|
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//No script files :( |
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return false; |
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} |
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|
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//Joins and optimizes JS |
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public function minify() |
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{ |
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foreach($this->scripts as $script) |
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{ |
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if(preg_match('#^INLINE;#',$script)) |
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{ |
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//Inline script |
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$script = preg_replace('#^INLINE;#','',$script); |
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//Add try-catch? |
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if($this->trycatch) |
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$script = 'try{'.$script.'}catch(e){}'; |
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$this->jscode .= "\n".$script; |
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}else{ |
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//External script |
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if($script !== false && file_exists($script) && is_readable($script)) |
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{ |
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$script = file_get_contents($script); |
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$script = preg_replace('/\x{EF}\x{BB}\x{BF}/','',$script); |
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//Add try-catch? |
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if($this->trycatch) |
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$script = 'try{'.$script.'}catch(e){}'; |
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$this->jscode .= "\n".$script; |
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}/*else{ |
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//Couldn't read JS. Maybe getpath isn't working? |
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}*/ |
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} |
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} |
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|
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//Check for already-minified code |
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$this->md5hash = md5($this->jscode); |
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$ccheck = new autoptimizeCache($this->md5hash,'js'); |
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if($ccheck->check()) |
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{ |
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$this->jscode = $ccheck->retrieve(); |
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return true; |
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} |
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unset($ccheck); |
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|
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//$this->jscode has all the uncompressed code now. |
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if(class_exists('JSMin')) |
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{ |
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$this->jscode = trim(JSMin::minify($this->jscode)); |
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return true; |
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}else{ |
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return false; |
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} |
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} |
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|
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//Caches the JS in uncompressed, deflated and gzipped form. |
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public function cache() |
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{ |
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$cache = new autoptimizeCache($this->md5hash,'js'); |
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if(!$cache->check()) |
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{ |
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//Cache our code |
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$cache->cache($this->jscode,'text/javascript'); |
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} |
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$this->url = AUTOPTIMIZE_CACHE_URL.$cache->getname(); |
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$this->url = $this->url_replace_cdn($this->url); |
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} |
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|
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// Returns the content |
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public function getcontent() |
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{ |
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// Restore the full content |
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if(!empty($this->restofcontent)) |
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{ |
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$this->content .= $this->restofcontent; |
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$this->restofcontent = ''; |
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} |
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|
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// Add the scripts taking forcehead/ deferred (default) into account |
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if($this->forcehead == true) { |
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$replaceTag="</head>"; |
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$defer=""; |
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} else { |
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$replaceTag="</body>"; |
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$defer="defer "; |
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} |
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|
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$bodyreplacement = implode('',$this->move['first']); |
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$bodyreplacement .= '<script type="text/javascript" '.$defer.'src="'.$this->url.'"></script>'; |
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$bodyreplacement .= implode('',$this->move['last']).$replaceTag; |
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$this->content = str_replace($replaceTag,$bodyreplacement,$this->content); |
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|
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// Restore IE hacks |
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$this->content = preg_replace('#%%IEHACK%%(.*)%%IEHACK%%#Usie','stripslashes(base64_decode("$1"))',$this->content); |
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|
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// Restore noptimize |
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$this->content = $this->restore_noptimize($this->content); |
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|
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// Return the modified HTML |
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return $this->content; |
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} |
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|
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//Checks agains the whitelist |
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private function ismergeable($tag) |
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{ |
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foreach($this->domove as $match) |
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{ |
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if(strpos($tag,$match)!==false) |
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{ |
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//Matched something |
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return false; |
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} |
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} |
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|
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foreach($this->dontmove as $match) |
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{ |
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if(strpos($tag,$match)!==false) |
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{ |
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//Matched something |
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return false; |
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} |
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} |
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|
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//If we're here it's safe to merge |
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return true; |
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} |
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|
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//Checks agains the blacklist |
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private function ismovable($tag) |
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{ |
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|
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foreach($this->domove as $match) |
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{ |
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if(strpos($tag,$match)!==false) |
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{ |
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//Matched something |
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return true; |
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} |
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} |
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|
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foreach($this->dontmove as $match) |
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{ |
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if(strpos($tag,$match)!==false) |
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{ |
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//Matched something |
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return false; |
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} |
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} |
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|
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//If we're here it's safe to move |
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return true; |
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} |
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|
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private function movetolast($tag) |
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{ |
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foreach($this->domovelast as $match) |
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{ |
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if(strpos($tag,$match)!==false) |
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{ |
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//Matched, return true |
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return true; |
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} |
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} |
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|
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//Should be in 'first' |
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return false; |
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} |
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} |
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|
